发明授权
US09487452B2 Urea passivation technique and new product passivated urea, to make urea or urea-based compound universally blendable
有权
尿素钝化技术和新产品钝化尿素,使尿素或脲基化合物普遍混合
- 专利标题: Urea passivation technique and new product passivated urea, to make urea or urea-based compound universally blendable
- 专利标题(中): 尿素钝化技术和新产品钝化尿素,使尿素或脲基化合物普遍混合
-
申请号: US14422937申请日: 2013-08-28
-
公开(公告)号: US09487452B2公开(公告)日: 2016-11-08
- 发明人: Francois Ledoux
- 申请人: Yara International ASA
- 申请人地址: NO Oslo
- 专利权人: YARA INTERNATIONAL ASA
- 当前专利权人: YARA INTERNATIONAL ASA
- 当前专利权人地址: NO Oslo
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: NO20120973 20120829
- 国际申请: PCT/EP2013/067799 WO 20130828
- 国际公布: WO2014/033160 WO 20140306
- 主分类号: C05C9/00
- IPC分类号: C05C9/00 ; C05C1/00 ; C05C5/00 ; C05C5/04 ; C05B1/02 ; C05G3/00 ; C07C273/14
摘要:
The invention concerns a method of producing passivated urea or urea based compounds for fertilizer blends wherein the urea particles are treated with a mineral acid that reacts with urea and creates a grasping layer. Thereafter a solid base in powder form is added in excess to the particles to coat the acidified particle surface. The invention also concerns a fertilizer blend comprising the passivated urea or urea based compounds with one or more of AN or AN-based compound, NS products, superphosphates, and more generally with a priori most compounds that urea is susceptible to react with when in direct contact. A safe blend comprises more than 40 weight % of the passivated urea.
公开/授权文献
信息查询